diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java')
| -rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java b/core/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java deleted file mode 100644 index 29d8b369..00000000 --- a/core/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java +++ /dev/null @@ -1,120 +0,0 @@ -package org.bouncycastle.crypto.params; - -import org.bouncycastle.crypto.DerivationParameters; -import org.bouncycastle.util.Arrays; - -/** - * This KDF has been defined by the publicly available NIST SP 800-108 specification. - * NIST SP800-108 allows for alternative orderings of the input fields, meaning that the input can be formated in multiple ways. - * There are 3 supported formats: - Below [i]_2 is a counter of r-bits length concatenated to the fixedInputData. - * <ul> - * <li>1: K(i) := PRF( KI, [i]_2 || Label || 0x00 || Context || [L]_2 ) with the counter at the very beginning of the fixedInputData (The default implementation has this format)</li> - * <li>2: K(i) := PRF( KI, Label || 0x00 || Context || [L]_2 || [i]_2 ) with the counter at the very end of the fixedInputData</li> - * <li>3a: K(i) := PRF( KI, Label || 0x00 || [i]_2 || Context || [L]_2 ) OR:</li> - * <li>3b: K(i) := PRF( KI, Label || 0x00 || [i]_2 || [L]_2 || Context ) OR:</li> - * <li>3c: K(i) := PRF( KI, Label || [i]_2 || 0x00 || Context || [L]_2 ) etc... with the counter somewhere in the 'middle' of the fixedInputData.</li> - * </ul> - * <p> - * This function must be called with the following KDFCounterParameters(): - * - KI <br/> - * - The part of the fixedInputData that comes BEFORE the counter OR null <br/> - * - the part of the fixedInputData that comes AFTER the counter OR null <br/> - * - the length of the counter in bits (not bytes) <br/> - * </p> - * Resulting function calls assuming an 8 bit counter. - * <ul> - * <li>1. KDFCounterParameters(ki, null, "Label || 0x00 || Context || [L]_2]", 8); </li> - * <li>2. KDFCounterParameters(ki, "Label || 0x00 || Context || [L]_2]", null, 8); </li> - * <li>3a. KDFCounterParameters(ki, "Label || 0x00", "Context || [L]_2]", 8); </li> - * <li>3b. KDFCounterParameters(ki, "Label || 0x00", "[L]_2] || Context", 8);</li> - * <li>3c. KDFCounterParameters(ki, "Label", "0x00 || Context || [L]_2]", 8); </li> - * </ul> - */ -public final class KDFCounterParameters - implements DerivationParameters -{ - - private byte[] ki; - private byte[] fixedInputDataCounterPrefix; - private byte[] fixedInputDataCounterSuffix; - private int r; - - /** - * Base constructor - suffix fixed input data only. - * - * @param ki the KDF seed - * @param fixedInputDataCounterSuffix fixed input data to follow counter. - * @param r length of the counter in bits. - */ - public KDFCounterParameters(byte[] ki, byte[] fixedInputDataCounterSuffix, int r) - { - this(ki, null, fixedInputDataCounterSuffix, r); - } - - /** - * Base constructor - prefix and suffix fixed input data. - * - * @param ki the KDF seed - * @param fixedInputDataCounterPrefix fixed input data to precede counter - * @param fixedInputDataCounterSuffix fixed input data to follow counter. - * @param r length of the counter in bits. - */ - public KDFCounterParameters(byte[] ki, byte[] fixedInputDataCounterPrefix, byte[] fixedInputDataCounterSuffix, int r) - { - if (ki == null) - { - throw new IllegalArgumentException("A KDF requires Ki (a seed) as input"); - } - this.ki = Arrays.clone(ki); - - if (fixedInputDataCounterPrefix == null) - { - this.fixedInputDataCounterPrefix = new byte[0]; - } - else - { - this.fixedInputDataCounterPrefix = Arrays.clone(fixedInputDataCounterPrefix); - } - - if (fixedInputDataCounterSuffix == null) - { - this.fixedInputDataCounterSuffix = new byte[0]; - } - else - { - this.fixedInputDataCounterSuffix = Arrays.clone(fixedInputDataCounterSuffix); - } - - if (r != 8 && r != 16 && r != 24 && r != 32) - { - throw new IllegalArgumentException("Length of counter should be 8, 16, 24 or 32"); - } - this.r = r; - } - - public byte[] getKI() - { - return ki; - } - - public byte[] getFixedInputData() - { - //Retained for backwards compatibility - return Arrays.clone(fixedInputDataCounterSuffix); - } - - public byte[] getFixedInputDataCounterPrefix() - { - return Arrays.clone(fixedInputDataCounterPrefix); - } - - public byte[] getFixedInputDataCounterSuffix() - { - return Arrays.clone(fixedInputDataCounterSuffix); - } - - public int getR() - { - return r; - } -} |